As so-called 'meaningless' fixtures between the Old Firm go, May 7, 1995 turned out to be an emphatic one for Celtic, recoiling as they were from another Premier League won in comfortable fashion by Rangers.
With the Ibrox club already crowned champions this season, as faltering Celts' 10 in a row dreams blew up, Steven Gerrard must be concerned that an otherwise imperious, unbeaten League campaign may end up bookended by sluggish complacency.
Last Sunday's shock penalty shoot-out Scottish Cup exit to St Johnstone stung the Rangers manager - and understandably so. That the Gers failed to account for a well-organised Saints is sharp evidence for any team, irrespective of weekly dominance, that overriding contentment is sheer folly.
With Celtic already out of the competition, Rangers, frankly, should have been looking forward to claiming a double - and have no excuses for their elimination.
However, in a business peppered with hypotheticals, Light Blues fans would, in theory, always have accepted the Premiership at the expense of blowing their chances in both Cup competitions at the Quarter-Final stage.
Not that such a view was consolation, raking over the Saints slump. The blue riband celebrations over a 55th domestic title will invariably be irked by going out in the League Cup to St Mirren and to the Perth outfit.
Like Celtic's myriad of setbacks in 2020-21, the damage has been done - and now it is Gerrard's job to help Rangers get over it. At least a game against ancient rivals is, theoretically, just the encounter to concentrate the collective minds, particularly when a 100-point target can be met with three Premiership games remaining.
Back to that derby nearly 26 years ago. An Ibrox side, even under the stern gaze of Walter Smith and featuring Brian Laudrup, Mark Hateley and Ian Durrant, having completed the hard work, couldn't rouse themselves with Celtic enjoying a green party in a straightforward 3-0 triumph.
For if Rangers supporters, and indeed even Gerrard and his assistant Gary McAllister, are inclined to wander into the history books, it is a salutary lesson.
Additionally, while the Scottish Cup eludes Gerrard this term, the Ibrox chief can possibly take small solace in that a previous incumbent, Graeme Souness no less, failed to land it across his trophy-laden era. Going back much further, Scot Symon, Bill Struth's successor, took 11 attempts to win one of the available Cups between 1954-59.
Celtic, meanwhile, are aiming to at least finish this wretched campaign on a high, with interim boss John Kennedy impressively talking up his team's chances on Friday.
Kennedy stated the obvious that "you always get judged in games against Rangers". He also made the point - with fair justification - that Celtic's general play has been good in recent city clashes, but the misfiring has ultimately cost them.
This will presumably be uppermost in his mind when deciding on the Hoops' offensive strategy this afternoon. Might the interim manager be tempted to start with the ever-controversial Leigh Griffiths? Odsonne Edouard has not been pulling up any trees and his status as Celtic's record signing is no camouflage for what is becoming a waning impact.
Football fans in Glasgow are, somewhat amusingly, experts in body language of those in Old Firm colours, yet only a cursory glance in the direction of the Frenchman indicates that his head is now elsewhere.
Edouard may be, privately, sizing up the exit door, and you imagine there will be plenty of suitors for Brendan Rodgers' one-time prodigy and marksman, but can he be relied upon to come up with something special at Ibrox?
Kennedy is likely to keep faith in the 23-year-old and Edouard should realise that major games represent a shop window.
A dearth of normal verve and ingenuity can see a diminishing of value to both player and club. With Gerrard confirming that central defender Jack Simpson will make only his second full appearance to replace injured Filip Helander, either Edouard or Griffiths can perhaps expose a player inexperienced with this fixture's intensity, even behind closed doors.
Incidentally, that May day in 1995 proved, in fact, to be far more important to Celtic, in their season-long residency at Hampden while Parkhead was being redeveloped
The team, then managed by Tommy Burns, had at least a Scottish Cup Final to prepare for a few weeks later.
Pierre van Hooijdonk ran riot on both days at the National Stadium.
Rangers, on the other hand, having won the title, were disinterested, and losing direction - the club's mind focused on the imminent signing of a certain Paul Gascoigne.
Such are the levels.